Apprentiship internship

I'm a veteran mail carrier, and future farmer. I'm looking for apprentiship type opportunities throughout the U.S. and possibly elsewhere. I'm interested in sustainable architecture, permaculture, organic hydro/aquaponics, and becoming a generalist. I've pursued Civil Engineering obtaining an associate degree, but had a hard time financially working and going to school, so I took a job offer with the Post Office. My work ethic and curiosity are second to none. I've been tinkering with small scale organic growing with raised beds and making my own compost with a fair amount of sucess.